Compression flush tank



Aug. 18, 1 925.

J. N. MURPHY COMPRESSION FLUSH TANK Filed Oct. 8, 1924 2 Sheets-Sheet 1' l/VVE/VTDR mmmwqm mafia ATTORNEYS Aug. 18, 1925.

1,549,846 J. N. MURPHY COMPRESSION FLUSH TANK Filed Oct. 8, 1924 2 Sheets-Sheet 2 MHZ,-

iPatented Aug. 1%, 1925e mute t, ii

, COMPRESSION Application filerl October 8,

To all whom it may concern:

Be it known that I, JOHN Mums-ii, a citizen of the United States, and a resident of S. ringfield, in theconnty of Sangamon and tate of Illinois, have invented a new and useful Improvement in Compression Flush Tanks, of which the following is a full, clear, and exactdescription. My invention relates to improvements in flush tanks for water closets, and it. consists in the combinations, constructions, and arrangements herein described and claimed. an object of my invention is to provide a flush tankof the type mentioned which eliminates the use of a ball valve, and which requires less water for the flushing operation than the ball valve tanks in ordinary use.

A further object of my invention is to provide a device which can be economically operated because of the fact that it is not liable to easily get out of order.

A further object of the invention is to provide a device in which the operating parts are easily accessible. a

A. further object of my invention is to provide a device of the type described which is positive and certain in operation, in that it cannot fail to flush when the parts are brought to the flushing position, nor waste water by continual leakage, such as that which is occasioned when a ball valve fails to seat properly.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming part of this ap plication, in which Figure 1 is a front elevation partly in section, of a tank constructed according to 7 my invention,

Figure 2 is a section through a portion 1 of the device, showing the operatinghandle.

and the crank attached thereto, and

Figure 8 is an enlarged sectional view through the plunger. valve and a' portion of the crank and pipe adjacent thereto.

In carrying out my invention, 1 make use of a tank, preferably of the shape shown in Figure 1, and which may be made of metal or other suitable material. The walls 1 of the tankjare continuous, so asto form an manner.

FLUSH TANK.

1924:. Serial No. 742,488.

air-tight chamber 2. The tank is provided with a bottom 3, (see Figure 3) and has an extension & which is integral with the body.

of the tankf The extension is provided with a valve housing 5 having an opening 6 connnunicating with the interior of the tank 2. The housing 5 is threaded at one end to receive a cap 7, a washer 8 being provided between the cap 7 and the walls of the extension. The cap is provided with a threaded opening 9 arranged to receive an inlet pipe 10 which may be connected with any suitable source of water under pressure, as, for instance, the city water main. o

Arranged to slide in the cylindrical portion of the valve housing 5 is a plunger valve 11. This valve 11 is adapted be actuated by a plunger rod 12, which passes through a plug 18 which is screwed into one end of the valve 11. A central, integral, cylindrical portion 11 of the valve 11 receives one end of the plunger 12 WlliOh is arranged to engage the end of the cylindrical portion'll to move the valve 11. The plunger valve 11 is provided with a gasket 14, which, as shown in Figure 3, is normally seated to shut off passage between the interior of the tank 2 and the pipe 15 leading to the bowl, (not shown). The valve housing projects through the opening in the exten sion 4, this projection being reduced and cylindrical in form, asshown at 16. n piston or plunger 17 is provided which is arranged to slide in the cylinder 16, a suitable packing gland 18 being provided.

The end of the plunger rod 12 is secured to a head 19 having a slot 20 extending therein. One end of the crank shaft 21 passes through the slot 20 and as will be seen from Figure 2, the opposite end is gournaled in a bearing 22 disposed in the flange 23, which extends downwardly from the tank, being preferably integral therewith. A handle 24 is secured to the crank 21 by means of the screw 25 or in any other It will be observed that the plunger rod 12 is hollow for a portion of its length. It is provided with an opening 27 on one side of the piston 17 and is provided with another opening 28 on the opposite side.

From the foregoing description of the i various parts of the device, the operation thereof may be readily understood. hen the city water is turned on, it passes through the inlet pipe 10, and thence into the interior of the plunger valve 11, forcing the latter rearwardly, (see Figure 3). lVhen the opening 6 is uncovered, the water passes up into the interior, to the tank. The latter being air-tight, permits the water to flow in until the air entrapped at the top of the tank is compressed into a point which equalizes the pressure of the incoming water. This pressure will hold the plunger valve 11 on its seat at 29, and hence will prevent any escape of water from the tank into the pipe 15. Now, when it is desired to flush the tank, the handle 24 is manipulated through the medium of the crank 21, and the slotted head 19, and forces the plunger valve 11 forwardly. This covers the opening 6 and prevents a flow of water into the tank, but it provides an opening for the flow of water between the valve seat 29 and the point 30, (see Figure 3). It will be observed that between the point 30 and the valve seat 29, the plunger valve is normally surrounded by water, so that when the valve is pushed away from its seat at 29, the water in the tank will be forced by the air pressure as well as gravity into the pipe 15, thus flushing the bowl.

On releasing the handle, the pressure of the water on the interior of the plunger valve 11 will cause the latter to move toward its seat 29. This movement would be very sudden, and to obviate a sudden impact which would make a noisy device. as well as to wear the parts, I provide the plunger 17 which operates in the cylinder 16. The water behind the plunger will be forced through the opening 27, and through the hollow plunger and out at the opening 28. Obviously these openings could be made as small as necessary to provide for slowing up the return of the plunger valve 11 to its seat. In other words, it has a dashpot effect, which slows up the action of the plunger 11.

After the plunger 11 has cleared the opening 6, the water will flow into the tank, the air will be compressed as before, and when the pressure is equalized, the flow will be stopped.

It will be noted that the interior of the tank is provided with partitions 31. These partitions, it will be noted, are downwardly directed, and tend to facilitate the discharge of the contents of the tank, and to prevent eddy currents. The presence of the latter might tend to permit the air to pass directly through the opening and out into the dis charge pipe, thus slowing up the action. The use of the partitions, however, prevents this, so that the water is forcibly discharged by the air pressure into the pipe 15, thus increasing the velocity and volume of water passing into the bowl in any given time.

I claim:

1. A flush tank comprising an air-tight receptacle, a cylinder projecting into a portion of said receptacle, and having an opening therein, an inlet pipe communicating with said cylinder, a plunger valve for covering and uncovering said opening, a discharge pipe, and a valve seat arranged to be engaged by one end of said plunger for cutting off communication between said discharge pipe and said receptacle.

2. A flush tank comprising an air-tight receptacle, a cylinder projecting into a portion of said receptacle and having an opening therein, an inlet pipe communicating with said cylinder, a plunger valve for covering and uncovering said opening, a discharge pipe, a valve seat arranged to be engaged by one end of .said plunger for cutting off communication between said discharge pipe and said receptacle, a plunger rod, and a dashpot associated with said plunger rod for retarding the movement of said plunger valve.

8. A flush tank comprising an air-tight receptacle, a cylinder projecting into a portion of said receptacle and having an opening therein, an inlet pipe communicating with said cylinder a plunger valve for covering and uncovering said opening, a discharge pipe, a valve seat arranged to be engaged by one end of said plunger for cutting off communication between said discharge pipe and said receptacle, a plunger rod, and a dashpot associated with said plunger rod for retarding the movement of said plunger valve, said receptacle having a plurality of partitions, whereby eddy currents are prevented.

4:. A flush tank comprising an air-tight receptacle. a cylinder projecting into a portion of said receptacle, and having an opening therein. an inlet pipe communicating with said cylinder, a plunger valve for covering and uncovering said opening, a discharge pipe, a valve seat arranged to be engaged by one end of said plunger for cutting ofl communication between said discharge pipe and said receptacle, a slotted head connected with said plunger rod, a crank connected with said slotted head for moving said plunger rod, and a series of partitions disposed in said receptacle for preventing eddy currents.

I 5. A flush tank comprising an air-tight receptacle, a cylinder projecting into the bottom portion of said receptacle, an inlet pipe, means for securing the inlet pipe to one end of the cylinder, said cylinder having an inlet opening communicating with the interior of said receptacle, a plunger valve disposed within the cylinder and arranged to open and close said inlet opening, a discharge pipe for said receptacle, one end of said plunger Valve being arranged to cut off communication between the receptacle and the discharge pipe, a plunger rod connected with said plunger valve, a dash pot cylinder, a piston in said dash pot secured to said plunger rod, said plunger rod having a passage for permitting the escape of fluids from one end of said dash pot in opening.

JOHN N. MURPHY. 

